/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraSystem.h
const [FNiagaraDataSetAccessor](API\Plugins\Niagara\FNiagaraDataSetAccessor)< [ENiagaraExecutionState](API\Plugins\Niagara\ENiagaraExecutionState) > & GetSystemExecutionStateAccessor() const